<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			*{
				margin: 0;
				padding: 0;
			}
			a{text-decoration: none;}
			ul li{list-style: none;}
			img{vertical-align: top;}
			.box{
				width: 400px;
				height: 400px;
				
				margin: 50px auto;
			}
			.box ul{
				width: 400px;
				height: 100px;
				margin-top: 300px;
				
			}
			.box ul li{
				float: left;
				width: 100px;
				height: 100px;
				position: relative;
			}
			.box ul li .i1{
				width: 100px;
				height: 100px;
				
			}
			.box ul li:nth-child(1) .i2{
				width: 400px;
				height: 300px;
				position: absolute;
				top:-300px;
				
				display: block;
			}
			.box ul li:nth-child(2) .i2{
				width: 400px;
				height: 300px;
				position: absolute;
				top:-300px;
				left:-100px;
				display: none;
			}
			.box ul li:nth-child(3) .i2{
				width: 400px;
				height: 300px;
				position: absolute;
				top:-300px;
				left:-200px;
				display: none;
			}
			.box ul li:nth-child(4) .i2{
				width: 400px;
				height: 300px;
				position: absolute;
				top:-300px;
				left:-300px;
				display: none;
			}
			.box ul li:hover .i2{
				display: block;
				z-index: 999;
			}
		</style>
	</head>
	<body>
		<div class="box">
			<ul>
				<li>
					<img src="../img/1.jpg" class="i1"/ >
					<img src="../img/1.jpg" class="i2"/>
				</li>
				<li>
					<img src="../img/2.jpg" class="i1"/ >
					<img src="../img/2.jpg" class="i2"/>
				</li>
				<li>
					<img src="../img/3.jpg" class="i1"/ >
					<img src="../img/3.jpg" class="i2"/>
				</li>
				<li>
					<img src="../img/4.jpg" class="i1"/ >
					<img src="../img/4.jpg" class="i2"/>
				</li>
			</ul>
		</div>
	</body>
</html>
